up overnight with the first flowers in remembrance of the two people killed at a mall near portland, oregon. >> this event has touched us deeply. >> reporter: this cell phone video shows what it was like in the moments after the shooting as police escorted shoppers to safety. >> it was scary. uhm... it was shocking. >> our cousin is a security guard in there. and his wife and their baby were in there but they got out okay. >> reporter: police arrived within minutes searching for the gunman in a crowd of thousands. >> police went armed and yelling at us to close the gate. so we closed the gate. >> women and children first, the whole standard procedure. >> reporter: authorities say when they found the shooter, he had already killed himself. this mall is still an active crime scene. with more than a million square feet, police tell us it will take some time to comb through looking for evidence. >> we look in every closet, every room we can get into. it's going to be an exhaustive search. >> reporter: there are hundreds of witnesses to interview. >> you get 10 people who saw the same incident a